System and method for automated tracking of assets using location measurements and ad-hoc routing algorithms

Abstract

A system and method for automated visual tracking of assets ( 302 ), such as personnel or vehicles, using location measurements and ad-hoc routing algorithms employed in a wireless multihopping communication network ( 100 ). The system and method comprise a plurality of imaging devices ( 300 ) that are deployed about an area and provide image information to at least one workstation ( 304 ) that displays the images based on the image information. In particular, as an asset ( 302 ) moves, the workstation ( 304 ) switches from displaying an image of the asset ( 302 ) captured by an imaging device ( 300 ) away from which the asset ( 302 ) is moving to displaying an image of the asset ( 302 ) captured by an imaging device ( 300 ) toward which the asset ( 302 ) is moving.

1. A method for tracking at least one asset using a multihopping communication network comprising a plurality of nodes, the method comprising:
 assigning at least one mobile node in the network to at least one asset; 
 assigning at least one stationary node in the network to at least one visual monitoring device; 
 tracking movement of the mobile node assigned to the asset in the network, wherein the tracking comprises:
 measuring one or more location data and one or more ranging data of the at least one asset by one or more nodes operating in the multihopping communication network, and 
 tracking movement of the mobile node based on the measured one or more location data and one or more ranging data; and 
 
 operating the visual monitoring device to capture image data of the asset based at least in part on the measured one or more location data and one or more ranging data. 
 
   
   
     2. A method as claimed in  claim 1 , further comprising:
 operating the stationary node assigned to the visual monitoring device to send the image data to a monitoring station for display. 
 
   
   
     3. A method as claimed in  claim 2 , further comprising:
 operating the monitoring station to display an image of the asset based at least in part on the image data. 
 
   
   
     4. A method as claimed in  claim 3 , further comprising:
 operating the stationary node assigned to the visual monitoring device to send to the monitoring station location information indicating a location of the asset; and 
 wherein the monitoring station operating step comprises operating the monitoring station to display the image of the asset based at least in part on the image data and the location information. 
 
   
   
     5. A method as claimed in  claim 4 , wherein:
 the monitoring station operating step comprises operating the monitoring station to display the image of the asset when the location information indicates that the asset is within a desired distance of the stationary node. 
 
   
   
     6. A method as claimed in  claim 1 , further comprising
 adjusting an orientation of the visual monitoring device based at least in part on the measured one or more location data or one or more ranging data. 
 
   
   
     7. A method as claimed in  claim 1 , wherein:
 the mobile node assigning step assigns each of a plurality of respective mobile nodes to a respective asset; 
 the stationary node assigning step assigns each of a plurality of stationary nodes to a respective visual monitoring device; 
 the tracking step tracks movement of the mobile nodes assigned to the assets in the network based at least in part on information exchanged between the mobile nodes and the stationary nodes; and 
 the operating step comprises operating the visual monitoring devices to capture respective image data of the respective assets based at least in part on the exchanged information. 
 
   
   
     8. A method as claimed in  claim 7 , further comprising:
 operating each of the stationary nodes assigned to the visual monitoring devices to send their respective image data to a monitoring station for display. 
 
   
   
     9. A method as claimed in  claim 8 , further comprising:
 operating the stationary nodes assigned to the visual monitoring devices to send to the monitoring station respective location information indicating respective locations of the respective assets; and 
 wherein the monitoring station operating step comprises operating the monitoring station to display the respective images of the respective assets based at least in part on the respective image data and the respective location information. 
 
   
   
     10. A system for tracking at least one asset using a multihopping communication network comprising a plurality of nodes, the system comprising:
 at least one mobile node to communicate in the network and assigned to at least one asset; and 
 at least one stationary node to communicate in the network and assigned to at least one visual monitoring device, wherein the stationary node tracks movement of the mobile node assigned to the asset in the network based at least in part on one or more location data and one or more ranging data measured at one or more nodes operating in the multihopping communication network, and sends the one or more location data and one or more ranging data to the visual monitoring device based at least in part on which the visual monitoring device captures image data of the asset. 
 
   
   
     11. A system as claimed in  claim 10 , further comprising:
 a monitoring station; and 
 wherein the stationary node assigned to the visual monitoring device sends the image data to the monitoring station. 
 
   
   
     12. A system as claimed in  claim 11 , wherein:
 the monitoring station displays an image of the asset based at least in part on the image data. 
 
   
   
     13. A system as claimed in  claim 12 , wherein:
 the stationary node assigned to the visual monitoring device sends to the monitoring station location information indicating a location of the asset; and 
 wherein the monitoring station displays the image of the asset based at least in part on the image data and the location information. 
 
   
   
     14. A system as claimed in  claim 13 , wherein:
 the monitoring station displays the image of the asset when the location information indicates that the asset is within a desired distance of the stationary node. 
 
   
   
     15. A system as claimed in  claim 10 , wherein
 the stationary node assigned to the asset provides the one or more location data and one or more ranging data to the visual monitoring device such that the visual monitoring device adjusts its orientation based on the one or more location data and one or more ranging data. 
 
   
   
     16. A system as claimed in  claim 10 , further comprising:
 a plurality of mobile nodes, each assigned to a respective asset; and 
 a plurality of stationary nodes, each assigned to a respective visual monitoring device to track movement of the mobile nodes assigned to the assets based on information exchanged between itself and the mobile nodes and to send the exchanged information to its visual monitoring device based at least in part on which the visual monitoring device captures image data of the assets being tracked. 
 
   
   
     17. A system as claimed in  claim 16 , further comprising:
 a monitoring station; and 
 wherein the stationary nodes assigned to the visual monitoring devices send their respective image data to the monitoring station. 
 
   
   
     18. A system as claimed in  claim 17 , wherein:
 the stationary nodes assigned to the visual monitoring devices further send to the monitoring station respective location information indicating respective locations of the respective assets; and 
 wherein the monitoring station displays the respective images of the respective assets based at least in part on the respective image data and the respective location information. 
 
   
   
     19. A method for tracking a visual image of at least one asset in a mobile ad hoc communication network, the method comprising:
 displaying a first view captured by a first imaging device of the at least one asset at a monitoring station when the at least one asset is within imaging range of the first imaging device; 
 detecting at the monitoring station that the at least one asset is moving from the imaging range of the first imaging device to an imaging range of a second imaging device wherein the detecting comprises
 measuring one or more location data and one or more ranging data of the at least one asset by one or more nodes operating within the mobile ad hoc communication network, and 
 detecting at the monitoring station that the at least one asset is moving from the imaging range of the first imaging device to an imaging range of a second imaging device based on the measured one or more location data and one or more ranging data; and 
 
 displaying at the monitoring station a second view captured by the second imaging device of the at least one asset. 
 
   
   
     20. The method of  claim 19 , further comprising:
 continuing to display the first view captured by the first imaging device along with the second view captured by the second imaging device at the monitoring display. 
 
   
   
     21. The method of  claim 19 , farther comprising prior to the displaying the first view step:
 measuring one or more location data and one or more ranging data of the at least one asset by one or more nodes operating within the mobile ad hoc communication network; and 
 adjusting an orientation of the first imaging device using the measured one or more location data and one or more ranging data of the at least one asset. 
 
   
   
     22. The method of  claim 19 , further comprising prior to the displaying the second view step:
 measuring one or more location data and one or more ranging data of the at least one asset by one or more nodes operating within the mobile ad hoc communication network; and 
 adjusting an orientation of the second imaging device using the measured one or more location data and one or more ranging data of the at least one asset.